Spident Core.it System Kit - Core Build up ResinCore. it Flowable Dual Cured Core Build up Resin Spident Core. it System Kit is a dual cured composite material for use in the fabrication of core build up and post cementation. Apply [Indications] All types of core build up Cementation of root posts Contents Coreit System Kit: 2 x 10g Syringes Core. it dual Yellow, FineEtch 5ml, EsBond, EsBond Activator 5ml, Accessory. Characteristic Excellent flow & thixotropy Low polymerization shrinkage